Nut-lock.



www

No. 872,752. PATBNTED DBO. s, 1907.

P; MJRULLI L P. PEPE. 'Num Loox.

APPLIUATION FILED AUG. 1, 1907.

, UNiTED srATEs PATENT OFFICE..

PETER M. RULLI AND PHILLIP PEPE, OF NEW HAYES, PENNSYLVANIA,

narcis-Locri.`

To all whom 'it may concern:

Be it known thatwe, PETER M. RULLI and PHILLIP PEPE, citizens of the United States of America, residing at New Haven, in the county of Fayette and State of Pennsylvania, `have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to nut locks, and its object is to provide effective means for preventingthe loosening of a nut after it has been secured upon a bolt.

The invention consists in the combination with a bolt of novel construction, of a nut fitting upon said bolt, and a locking device comprising a sleeve or cap having an integral' screw.

Theconstruction of the improvement will be fully described hereinafter in connection with the accompanying drawing which forms a part of the specihcation, and its novel features Will be defined in the appended claims.

In the drawing, Figure 1 is a sectional elevation of a nut lock embodyingr the invention, Fie. 2 is a view in erspeetive of the end of the bolt, ig. 3 is a perspective view of the locking sleeve or cap, and Fig. 4 is an elevation of the notched nut employed.

he reference numerals 1 and 2 designate two sections of material, or plates of metal to be connected together, formed with registering openings to receive a'hollow bolt 3, said bolt being threaded-both internally and externally as shown. After the bolt 3 has been inserted, a'nut 4 is 'itted thereon, said nut having peripheral notches i 'lhe locking device com )rises a cap-nut (i, closed at its outer end, alnl'provided with an integralscrew 7 of a length to project beyond-the open end of the cap-nut which en- Speeifieation of Letters Patent. Application filed Aug-ust 1,*190'7. Serial Nd. 386.614.'

gages the internal threads of the hollow bolt i' rammedneas,1907.'l

3. The internal threads of the bolt are of i o )posite )itch to the external threads as illustrated in Fig. l. near the inner end thereot` is aat spring 8', the free end 9 of which is beveled to adapt it to engage the notches ot' the nut 4. A coil spring 1t) is interposed between the head 11 of the bolt, and the. free end of the screw 7; this spring serves owing toits tension being exerted against the end ofserew 7 to press the threads thereofl into engagement with the internal threads of the bolt 3 so as to have a tehdenev to held the cap nut at any time when the' lug 9 is not engaged with the nut 4. The outer end 12 of the ca -nut 6 is squared to adapt it to be removed y the application of a wrench. y

The utility and operation of the device will be readily understood from the drawing and foregoing des'cri tion.

Having now escribed our invention, what we claim as new, is

In a nut lock, a bolt having an externally threaded shank and an internally threaded bore, a nut itting en the external threads of the bolt and having peri heral notches at its outer end, a eapnut inc osing the'outer end of said bolt and abutting against the outer face of said nut, an interior screw integral with the closed end of the cap-nut and projecting beyond the open inner end of said cap-nut and engaging the internal threads of said bolt, and a spring secured at one end to the periphery of said cap-nut and having its` free end overlap ming -the said nut and engaging in 4one of san notches;

In testimony whereof we atli'x our signatures in the, presence of two witnesses.

ll'lllt M1 RULLI. lllILLIl PEPE.

Yitnessesz A (i. FREEMAN STILLWAGON,

A. W. llAlrr.

Secured to the sleeve 6.. 

